CN201689765U

CN201689765U - Transformer

Info

Publication number: CN201689765U
Application number: CN2009202660797U
Authority: CN
Inventors: 张文学
Original assignee: Beijing Dynamic Power Co Ltd
Current assignee: Beijing Dynamic Power Co Ltd
Priority date: 2009-11-04
Filing date: 2009-11-04
Publication date: 2010-12-29
Anticipated expiration: 2019-11-04

Abstract

The utility model provides a transformer, which can effectively solve the problem of radiation of the magnetic core and the coil and has the advantages of simple process, low power consumption, low price and high practical value. The transformer comprises two U-shaped magnetic cores, the two magnetic cores are arranged face to face so that the two cylinders of one U-shaped magnetic core can be butted with the two cylinders of the other U-shaped magnetic core, and the coil is wound on the butted cylinder; a secondary coil (or a primary coil) is wound outside a primary coil (or a secondary coil), and a shielding layer is arranged between the primary coil and the secondary coil and comprises a copper strip and an insulating film; the primary coil and the secondary coil also comprise a copper strip and an insulating film; the shielding layer is grounded when the transformer is used; and an epoxy resin plate with the thickness identical to the thickness of an air gap is adhered between the butted cylinders of the two U-shaped magnetic cores.

Description

A kind of transformer

Technical field

The utility model relates to the communication power supply field, relates in particular to the transformer of high frequency switch power.

Background technology

In the transformer of existing high frequency switch power, all be to constitute usually by EE or PQ type magnetic core and coil.(is example with EE type transformer) as shown in Figure 1, coil is wrapped on the magnetic core center pillar, the hottest point of magnetic core is positioned on the magnetic core center pillar, also have magnetic core to exist owing to surround the coil outside of magnetic core center pillar, make the heat on magnetic core center pillar and the coil be difficult to come out, the temperature of coil obtains fast rise like this; The magnetic core center pillar also continues to absorb heat from coil, causes magnetic core overheated, and magnetic core had just lost efficacy when the temperature of magnetic core reaches Curie temperature.In powerful components and parts, the heat dissipation problem of magnetic core and coil has become the key factor that influences transformer performance.

The utility model content

The utility model provides a kind of transformer, can effectively solve the heat dissipation problem of magnetic core and coil, and technology is simple, low in energy consumption, low price, has stronger practical value.

The utility model thes contents are as follows:

A kind of transformer that is used for high frequency switch power comprises: two U type magnetic cores are docking together two magnetic posts of a U type magnetic core and two magnetic posts of another U type magnetic core with aspectant direction, and coil is wrapped on the butt joint magnetic post.

Wherein secondary coil (or primary coil) is wrapped in the outside of primary coil (or secondary coil), and a screen is arranged between primary coil and the secondary coil; This screen is made of copper strips and dielectric film; Primary coil and secondary coil also are to be made of copper strips and dielectric film simultaneously; In the use of transformer, shielding layer grounding; Stick on docking between the magnetic post of two U type magnetic cores with air gap with thick epoxy sheet.

Description of drawings

Fig. 1 is the structure chart of EE type transformer;

Fig. 2 is the structure chart of the utility model transformer.

Specific embodiment

Below with reference to view the utility model is elaborated.As shown in Figure 2, transformer of the present utility model comprises two U type magnetic cores, an above coil.Coil is made up of primary coil, separator and secondary coil.This transformer is the formation magnetic core that is docking together of the magnetic post with two U type magnetic cores, and coil is wrapped on the magnetic post of butt joint.Wherein, primary coil, separator and secondary coil all are to add dielectric film by copper strips to constitute.Primary coil, separator and secondary coil also can all adopt the enamelled wire coiling to form simultaneously.Screen for the enamelled wire coiling has the slit unavoidably between circle and the circle, and makes trouble, and technological requirement is also than higher; And, consider approach effect for primary coil and secondary coil, and the loss of enamelled wire is bigger, if will reach the loss of adopting copper strips the time, technology can be complicated.Certainly require also can adopt enamelled wire under the not too harsh situation in efficient.

Transformer of the present utility model in use, screen needs ground connection, just can reduce the electric capacity between primary coil and the secondary coil, helps the common-mode noise that reduces to be coupled like this.

Can be in parallel between the primary coil of the utility model transformer or series connection use, also can be in parallel between the secondary coil and series connection use.In addition, stick on docking between the magnetic post of two U type magnetic cores with air gap with thick epoxy sheet.

In this transformer, coil is wrapped on the butt joint magnetic post, and the coil outside is not surrounded by magnetic core, make magnetic core and the coil can better distribute heat, help reducing the temperature of magnetic core and coil, improve the performance of transformer, and technology is simple, low in energy consumption, low price.

Above explanation just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, above content should not be construed as restriction of the present utility model.

Claims

1. transformer, it is characterized in that: two U type magnetic cores are docking together two magnetic posts of a U type magnetic core and two magnetic posts of another U type magnetic core with aspectant direction, primary coil and secondary coil all are wrapped on the butt joint magnetic post, and one deck screen is arranged between primary coil and the secondary coil.

2. transformer according to claim 1, it is characterized in that: this screen is made of copper strips and dielectric film.

3. transformer according to claim 1 is characterized in that primary coil and secondary coil all are to be made of copper strips and dielectric film.

4. transformer according to claim 1 is characterized in that: in the use of transformer, and shielding layer grounding.

5. transformer according to claim 1 is characterized in that: stick on docking between the magnetic post of two U type magnetic cores with air gap with thick epoxy sheet.